CVE-2026-45295Public exploitNetwork attack vector

Unauthenticated thread enumeration and read-status manipulation

Published Jul 20, 2026 · Updated Jul 20, 2026

Missing authorization in FreeScout before 1.8.219 allows remote attackers to enumerate thread IDs and alter read-status timestamps. OpenController.php's setThreadAsRead method accepts user-controlled conversation and thread IDs through the public tracking route, returns distinguishable 200 and 404 responses, and writes opened_at for a valid pair without authentication or authorization. The endpoint requires no session, cookies, or user interaction, and successful probes disclose which records exist while corrupting email open-tracking data.

CVSS severity6.5
Medium
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in FreeScout before 1.8.219 allows remote attackers to enumerate thread IDs and alter read-status timestamps. OpenController.php's setThreadAsRead method accepts user-controlled conversation and thread IDs through the public tracking route, returns distinguishable 200 and 404 responses, and writes opened_at for a valid pair without authentication or authorization. The endpoint requires no session, cookies, or user interaction, and successful probes disclose which records exist while corrupting email open-tracking data.

The record

CVE
CVE-2026-45295
Published
Jul 20, 2026
Updated
Jul 20, 2026
Vendor
FreeScout
Product
FreeScout
Classifications
CWE-862, CWE-639, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.8.219

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

FreeScout · FreeScoutversion=< 1.8.219

Published CVSS scores

6.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization
CWE-639Authorization Bypass Through User-Controlled Key
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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